No PFAS were detected in any of the 4 samples EPA's program collected.
Dekalb County is a public water system drawing on surface water, based in Decatur, Georgia, serving about 743,000 people, including Avondale Estates, Conyers, Clarkston, Decatur, Lithonia, Pine Lake. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 4 times across 1 sampling point between Nov 2024 and Sep 2025.
None of the 29 PFAS were found at or above EPA's minimum reporting levels (2 to 20 ppt depending on the compound).
Not detected: PFDA, 11Cl-PF3OUdS, PFHpS, PFPeS, NFDHA, PFEESA, PFMBA, PFPeA, PFMPA, 8:2 FTS, 4:2 FTS, 6:2 FTS, PFBA, HFPO-DA, PFOS, 9Cl-PF3ONS, PFUnA, PFHxA, PFDoA, PFOA, PFNA, PFHxS, PFHpA, PFBS, NMeFOSAA, NEtFOSAA, PFTrDA, PFTA, ADONA.
Lithium, tested in the same program: not detected.
In April 2024 EPA set enforceable limits of 4 ppt for PFOA and PFOS, 10 ppt each for PFHxS, PFNA and GenX, and a hazard index of 1 for mixtures. Utilities were given until 2029 to comply. In May 2026 EPA proposed keeping only the PFOA and PFOS limits and moving that deadline to 2031. Until that proposal is final, the 2024 limits stand.
Compliance is judged on a running annual average at each entry point, so we show the average at this system's worst sampling point next to its single highest result. UCMR 5 results do not by themselves put a utility in or out of compliance.
No PFAS action is needed on these results. If your water tastes or smells of chlorine, a whole-house city water filter is the usual fix.
All 256 tested systems in Georgia
30002 30012 30021 30030 30032 30033 30034 30035 30038 30058 30072 30074 30079 30083 30084 30085 30086 30087 30088 30288 30294 30312 30319 30322 30329 30333 30338 30340 30341 30345 30360
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in Dekalb County water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID GA0890001. https://wellandtap.com/pfas/georgia/dekalb-county/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID GA0890001). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
